Fix checking crop region for home/recents

Wasn't handling split-screen properly. Now it checks if the
home/recents is the top of its "visibility" stack vs top
of root-task. This means it must be the top sibling in either
the displayarea or the root-split. This check is necessary
for dealing with visible windows that are behind a translucent
task.

Bug: 159138687
Test: Enter split with 2 apps, close the top app, return to home
      and verify that it receives touches in top half
Change-Id: Ie6fed2dd945952b83116721a98fc6d7c8396729f

services/core/java/com/android/server/wm/Task.java

@@ -2927,9 +2927,17 @@ class Task extends WindowContainer<WindowContainer> {
         // Don't crop HOME/RECENTS windows to stack bounds. This is because in split-screen
         // they extend past their stack and sysui uses the stack surface to control cropping.
         // TODO(b/158242495): get rid of this when drag/drop can use surface bounds.
-        final boolean isTopHomeOrRecents = (isActivityTypeHome() || isActivityTypeRecents())
-                && getRootTask().getTopMostTask() == this;
-        return isResizeable() && !isTopHomeOrRecents;
+        if (isActivityTypeHome() || isActivityTypeRecents()) {
+            // Make sure this is the top-most non-organizer root task (if not top-most, it means
+            // another translucent task could be above this, so this needs to stay cropped.
+            final Task rootTask = getRootTask();
+            final Task topNonOrgTask =
+                    rootTask.mCreatedByOrganizer ? rootTask.getTopMostTask() : rootTask;
+            if (isDescendantOf(topNonOrgTask)) {
+                return false;
+            }
+        }
+        return isResizeable();
     }
 
     /**

services/core/java/com/android/server/wm/WindowState.java

@@ -3412,6 +3412,7 @@ class WindowState extends WindowContainer<WindowState> implements WindowManagerP
     private void setTouchableRegionCropIfNeeded(InputWindowHandle handle) {
         final Task task = getTask();
         if (task == null || !task.cropWindowsToStackBounds()) {
+            handle.setTouchableRegionCrop(null);
             return;
         }